Ubuntu on a 4 GB SD Card, can this be done?

I have a notebook with an 80 GB HDD, which I feel is too small to partition, yet still have Windows run a lot of other programs/games. However, I also have an external HDD (Seagate 160 GB), that I tried installing Ubuntu Dapper Drake on, but Ubuntu gave me a pain in the butt, so I aborted that approach. However, Ubuntu does seem to catch onto SD Cards rather easily. Unfortunately, I only have a 1 GB SD Card, which would be too small for anything to install on it. However, I notice that there are such things as 4 GB SD Cards, from what I saw. Do you think that 4 GB would be enough for Ubuntu to install on an SD Card as a second OS off-site (because there's no way you can have two internal HDDs on a notebook).

Why, sure, that would be a great move. I would have tried Fedora Core 4 or 5, but dunno what that would do for external HDDs... I hear that was one of your more popular distros, but it may not be the cheapest one, unfortunately.

SD and other flash cards have limited write cycles, which could eventually become a problem with swap usage, etc. There are actually some Linux distros out there that support flash cards specifically by using file systems that write to them intelligently. I don't know if any are suitable for BlitzMax tho.

You might want to check on the Ubuntu forums if anyone has tried this before. I know for example you can install it to boot off a flash drive like you would with the Live CD, but I don't think it's intended for you to work off that drive.